Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS5537994 A
Publication typeGrant
Application numberUS 08/253,949
Publication dateJul 23, 1996
Filing dateJun 3, 1994
Priority dateJun 3, 1994
Fee statusPaid
Also published asCA2191704A1, CA2191704C, EP0768845A1, EP0768845A4, US5755219, US6209542, WO1995033418A1
Publication number08253949, 253949, US 5537994 A, US 5537994A, US-A-5537994, US5537994 A, US5537994A
InventorsW. Keith Thornton
Original AssigneeThornton; W. Keith
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Combination face mask and dental device for improved breathing during sleep
US 5537994 A
Abstract
A combination face mask and dental device for improved breathing during sleeping is provided in which a face mask (10) is connected through an air tube (14) to a gas supply system (16). The face mask (10) is connected through a connector (20) to a dental device (18).
Images(4)
Previous page
Next page
Claims(9)
What is claimed is:
1. A device for assisting breathing, comprising:
a face mask;
a system for supplying gas to said face mask; and
a dental device adjustably connected to said face mask;
a connector for connecting said dental device to said face mask, wherein said connector comprises:
a support member, having a fist ball joint and a second ball joint, coupled to said face mask at said first ball joint; and
a joining member coupled to said support member at said second ball joint, said joining member coupled to said dental device.
2. The device of claim 1, wherein said support member comprises first and second individual support members.
3. A device for assisting breathing, comprising:
a face mask;
a system for supplying gas to said face mask;
a support member, having a first ball joint and a second ball joint, coupled to said face mask at said first bail joint;
a joining member coupled to said support member at said second ball joint; and
an upper arch coupled to said joining member, said upper arch including a post for causing a user's lower jaw to extend forward.
4. The device of claim 3, wherein said support member comprises first and second individual support members.
5. The device of claim 3, wherein said system for supplying gas comprises a constant positive air pressure system.
6. The device of claim 3, and further comprising a lower arch.
7. The device of claim 3, wherein said upper arch comprises a custom mold of at least some of a user's upper teeth.
8. The device of claim 7, wherein said upper arch includes a deformable material capable of being molded to at least some of a user's upper teeth.
9. A device for assisting breathing, comprising:
a face mask operable to deliver air to the nose of a user, the face mask operable to prevent the device from delivering air to the lips of the user;
a system for supplying gas to said face mask;
a dental device adjustably connected to said face mask; and
a connector for connecting said dental device to said face mask, wherein said connector comprises:
a support member, having a first ball joint and a second ball joint, coupled to said face mask at said first ball joint; and
a joining member coupled to said support member at said second ball joint, said joining member coupled to said dental device.
Description
CROSS REFERENCES TO RELATED APPLICATIONS

This application is related to U.S. patent application Ser. No. 08/129,598, filed Sep. 29, 1993 and entitled APPARATUS FOR PREVENTION OF SNORING AND IMPROVED BREATHING DURING SLEEP.

TECHNICAL FIELD OF THE INVENTION

This invention relates generally to medical devices, and more particularly to a combination face mask and dental device for improved breathing during sleep.

BACKGROUND OF THE INVENTION

Many people experience difficulty in sleeping because of breathing problems. These problems may result in snoring, or the more serious condition of sleep apnea.

One treatment for serious sleep breathing disorders involves application of constant positive air pressure ("CPAP") to the patient. This CPAP is delivered through a face mask, nose mask, or nasal inserts and results in opening of the patient's breathing passageway. The CPAP pressure must be increased for more serious conditions. Face masks for delivering CPAP are commonly secured to the patient's head with an adjustable or elastic strap. As the patient moves during sleep, the face mask often shifts and unseats from the patient's face, resulting in a loss of pressure from the CPAP, or awakening of the patient.

Another treatment for sleep breathing disorders involves the use of dental devices for extending forward the lower jaw of the patient. These devices operate to more fully open the breathing passageway, thereby allowing for easier breathing, whether that breathing be through the nose or through the mouth. These dental devices treat snoring problems very well, but may not sufficiently treat more serious cases, such as some sleep apnea cases.

Therefore, a need has arisen for a device that will allow for more efficient treatment of breathing disorders during sleep, and which will assist in maintaining the proper seating of a CPAP face mask.

SUMMARY OF THE INVENTION

In accordance with the teachings of the present invention, a combination face mask and dental device is provided which significantly reduces or eliminates disadvantages and problems associated with prior art devices for treating breathing disorders during sleep.

In particular, a device for assisting breathing is provided in which a face mask is connected to a system for supplying gas to the face mask. A dental device is connected to the face mask. With such a system, the dental device serves as an anchor for the face mask. In a particular embodiment, the system for supplying gas is a constant positive air pressure system.

Furthermore, the dental device may comprise an upper arch that includes a post for causing a user's lower jaw to extend forward. The upper arch may be a custom mold of at least some of the user's upper teeth. Also, the upper arch may include a deformable material capable of being molded to as least some of the user's upper teeth.

In a particular embodiment, the dental device is connected to the face mask through a connector. The connector may include a support member coupled to the face mask at a first ball joint. The connector may also include a joining member coupled to the support member at a second ball joint, the joining member coupled to the dental device.

An important technical advantage of the present invention is the fact that a face mask is anchored by a dental device, thereby providing a more secure fit for the face mask.

Another important technical advantage of the present invention is the fact that a dental device may be used which causes the lower jaw to extend forward, thereby increasing the opening of the user's breathing passageway. This increased opening increases the effectiveness of treatment for sleep breathing disorders, such as sleep apnea.

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of the present invention, and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which:

FIG. 1 illustrates a combination face mask and dental device according to the teachings of the present invention;

FIG. 2 illustrates an alternative embodiment of a dental device according to the teachings of the present invention;

FIG. 3 illustrates another embodiment of a combination face mask and dental device according to the teachings of the present invention; and

FIG. 4 illustrates an exploded view of an embodiment for a connection between a face mask and dental device according to the teachings of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 illustrates a combination face mask and dental device according to the teachings of the present invention. As shown in FIG. 1, a face mask 10 is provided for fitting over a patient's nose. The particular face mask 10 shown in FIG. 1 is illustrative only, and any other face masks may be used without departing from the intended scope of the present invention. For example, the face mask 10 may fit over the patient's nose and mouth together, or mouth alone. Furthermore, the face mask 10 may be nasal inserts, or any device used to couple air to a patient. As shown in FIG. 1, face mask 10 may be secured to the patient's head with a strap 12. Strap 12 may be adjustable or elastic.

Face mask 10 is coupled through air tube 14 to CPAP system 16. CPAP system 16 provides constant positive air pressure to the patient through face mask 10. The pressure of the air delivered by CPAP system 16 depends upon the severity of the breathing disorder being treated. The more severe the disorder, the greater the pressure must be. In general, increasing the air pressure delivered by CPAP system 16 increases the opening of the breathing passageway. CPAP system 16 is shown as an example only. Other systems for delivering air at constant or varying pressures may also be used. Furthermore, any such systems may deliver any breathable gas, such as air or oxygen. It should be understood that the term "gas" used throughout this patent is meant to include air. Face mask 10 should be configured so as to allow air exhaled by the patient to be exhausted from the face mask 10.

As shown in FIG. 1, face mask 10 is connected to a dental device 18 through connector 20. Connector 20 includes support members 22 and 24 which are joined by tightener 26. For example, tightener 26 may be a tightening screw, a tightening bolt, or any other device for tightening. Support members 22 and 24 may be separate, or may be a single support member. Support members 22 and 24 communicate with a ball 28 and a ring 30. Ball 28 is connected to face mask 10 through a support 32. Ring 30 surrounds a joining member 34.

Joining member 34 attaches to dental device 18 at a connecting member 36 which is attached to dental device 18. End 38 of joining member 34 may connect with member 36 in any suitable fashion. For example, member 36 may be hollow and tapered as shown in FIG. 1, so that member 36 wedgedly engages in end 38. Similarly, end 38 may wedgedly engage with member 36. As another alternative, end 38 and member 36 may be connected with a fastener, such as a bolt, screw, or set pin, among others. Similarly, end 38 and member 36 may be bonded, as through a weld or adhesive. It should be understood that joining member 34 may be attached to dental device 18 in any suitable way.

Support members 22 and 24 in conjunction with ball 28 effectively form a universal ball joint, and thus support members 22 and 24 can freely move about ball 28. Similarly, ring 30 and support members 22 and 24 effectively form a universal ball joint, and thus joining member 34 can freely move up and down, and left and right, with respect to the patient.

The freedom of movement allowed by ball 28 and ring 30 allow for the dental device 18 and the face mask 10 to be comfortably and effectively fitted. Once they are so fitted, tightener 26 is tightened so as to maintain this comfortable and effective relationship between the face mask 10 and the dental device 18.

During use, the dental device 18 will be securely in place in the patient's mouth. Because it is connected to face mask 10 through connector 20, dental device 18 acts as an anchor, maintaining the placement and fit of face mask 10. This anchoring effect provides a significant advantage over prior art use of only a face mask, as use of only a face mask often results in unseating of the face mask during sleep.

As shown in FIG. 1, dental device 18 is an upper arch. Dental device 18 includes a deformable material 40 bonded to the device 18 and used for forming a mold of the patient's teeth for proper fitting. A suitable material for deformable material 40 is the ethylene-vinyl acetate copolymer resin sold under the registered trademark ELVAX. Any other suitable deformable materials may also be used. Typically, with a material such as ELVAX, the material 40 is heated to a temperature of about 150 F., through a microwave oven or by heating in hot water, for example, so as to place the material 40 in its deformable state. A patient then inserts the dental device and bites down, thereby deforming the material 40 into the shape of the patient's teeth. The dental device is then removed and allowed to cool, thereby setting the material 40 into a mold of the patient's teeth.

Also shown in FIG. 1 is a lower arch 42. Lower arch 42 may also include a deformable material 40. In a preferred embodiment, dental device 18 includes a downwardly extending post 44 which contacts lower arch 42 as shown in FIG. 1. This contacting forces the lower arch 42, and consequently the patient's lower jaw, forward, thereby opening the breathing passageway. By using the dental device shown in FIG. 1, the effectiveness of sleep breathing disorder treatments are enhanced, since not only is the CPAP treatment being applied, but so is the dental device treatment which increases the opening of the breathing passageway.

By using the dental device 18 shown in FIG. 1, the breathing passageway is opened more than normal, and thus CPAP system 16 need not deliver gas at as high a pressure as would be necessary without use of the dental device shown in FIG. 1. This provides a significant advantage over the use of CPAP systems alone.

The particular dental device shown in FIG. 1 is exemplary only, and other dental devices may be used without departing from the intended scope of the present invention. For example, the dental device shown in FIG. 1 is customized by a patient. However, as shown in FIG. 2, a dental device 50 molded from the patient's teeth by a dental professional may also be used. Dental device 50 includes upper arch 52, lower arch 54, and post 56. As another example, the lower arches 42 and 54 shown in FIGS. 1 and 2 need not be included. Without the lower arches, the posts 44 and 56 would contact the patient's teeth and gum. Examples of other suitable dental devices are described throughout U.S. patent application Ser. No. 08/129,598, entitled APPARATUS FOR PREVENTION OF SNORING AND IMPROVED BREATHING DURING SLEEP, which is herein incorporated by reference.

Moreover, although the preferred embodiment of the present invention is with a dental device that more fully opens the breathing passageway of the patient, dental devices that do not perform this function may also be used. As discussed above, one of the advantages of the present invention is that the dental device is used to anchor the face mask 10. Thus, any dental device that performs the anchoring function is contemplated by the present invention. As an example, a lower arch alone could be used to connect to face mask 10. Furthermore, dental devices not shaped as arches could also be used. Indeed, the term dental device is meant to include any oral appliance which can serve as an anchor for face mask 10.

FIG. 3 illustrates another embodiment of the present invention in which the joining member 34 is directly connected to dental device 18. With this embodiment, no connecting is required between the joining member 34 and the member 36 shown in FIG. 1.

FIG. 4 illustrates an exploded view of connector 20. As shown in FIG. 4, support members 22 are joined by tightener 26. Support members 22, 24 are formed, as shown in FIG. 4, so as to provide seats for ball 28 and ring 30, respectively. Ball 28 is fastened to mask 10 through support 32. Support 32 may be fastened to mask 10 in any suitable fashion, such as by welding or bonding, or through the use of fasteners, such as brads, pins, screws, and bolts, for example. The connector 20 may be formed of any suitable material, such as plastic or metal. It should be understood that the particular connector 20 shown is exemplary, and other connectors may also be used. For example, connectors that do not allow movement, or connectors that allow less or more movement than connector 20, may also be used without departing from the intended scope of this invention.

In summary, a combination face mask and dental device is provided in which the dental device is connected to the face mask, and acts as an anchor to secure the position and seating of the face mask. The face mask is connected to a CPAP system for providing gas to a patient, thereby opening the patient's breathing passageway. Furthermore, the dental device may include the capability of extending the lower jaw forward, so as to open the patient's breathing passageway, thereby increasing the efficiency of treatment for breathing disorders during sleeping.

Although the present invention has been described in detail, it should be understood that various modifications, substitutions, or alterations can be made without departing from the intended scope as defined by the appended claims.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US746869 *Aug 5, 1903Dec 15, 1903Stillman Augustus MoultonDevice for preventing snoring.
US1146264 *Jul 8, 1914Jul 13, 1915Will S KellyDental splint.
US1674336 *Oct 27, 1927Jun 19, 1928John King EdwardRespirator
US2424533 *Jul 21, 1945Jul 22, 1947Jay Faires WilliamAntisnore device
US2521039 *Mar 16, 1949Sep 5, 1950Victor H CarpenterTooth guard
US2531222 *Nov 25, 1946Nov 21, 1950Kesling Harold DTooth positioning appliance
US2590118 *Oct 1, 1949Mar 25, 1952Jr Vincent J OddoMouthpiece
US2833278 *Apr 5, 1956May 6, 1958Ross Harold MProtective mouthpiece
US2882893 *May 23, 1957Apr 21, 1959Godfroy Nicholas A CCombination mouth piece and air-way
US3107668 *Jul 17, 1962Oct 22, 1963Thompson Junior WMethod of forming a tooth protector
US3124129 *Apr 30, 1962Mar 10, 1964 Teeth protector
US3434470 *May 27, 1966Mar 25, 1969Strickland James CSnore inhibiting device
US3457916 *Dec 30, 1966Jul 29, 1969Personalized Equipment IncProtective mouthpiece
US3513838 *Oct 11, 1967May 26, 1970Dammermann Arnold BTeeth protector
US3864832 *Apr 3, 1973Feb 11, 1975Carlson Gunnar OlofThrow-away teeth protector
US3871370 *Jul 5, 1973Mar 18, 1975Mcdonald Lee ETongue-thrust correction appliance
US4016650 *Oct 31, 1975Apr 12, 1977Bayer AktiengesellschaftImpression tray for dental purposes
US4114614 *Nov 19, 1976Sep 19, 1978Kesling Peter CAthletic mouthguard
US4227877 *Oct 20, 1977Oct 14, 1980Black Knight Investments, LimitedAnatomical intra-orally moldable dental impression tray and method
US4304227 *Aug 27, 1979Dec 8, 1981Samelson Charles FDevice for treatment of snoring, bruxism or for avoidance of sleep apnea
US4376628 *May 9, 1980Mar 15, 1983B.V. GabaDevice for treating teeth
US4495945 *Mar 29, 1982Jan 29, 1985Liegner Kenneth BBite block
US4553549 *Oct 9, 1984Nov 19, 1985Pope Bryan MOral orthopedic/orthodontic appliance for treating neuromuscular imbalance
US4568280 *Jun 13, 1983Feb 4, 1986Ahlin Jeffrey HCraniomandibular appliance
US4569342 *Oct 13, 1983Feb 11, 1986Nostitz F VonDental impression tray and process for the use thereof
US4593686 *Nov 13, 1984Jun 10, 1986Lloyd Stephen RMonitor for an anti-apnea device
US4655213 *Oct 6, 1983Apr 7, 1987New York UniversityMethod and apparatus for the treatment of obstructive sleep apnea
US4799500 *Sep 30, 1986Jan 24, 1989Newbury Renton DMethod of and apparatus for treatment of muscle imbalance
US4862903 *Oct 9, 1987Sep 5, 1989U.S. Divers Company, Inc.Breathing mouthpiece for contacting upper palate and lower jaw of user's mouth
US4901737 *Apr 13, 1987Feb 20, 1990Toone Kent JMethod and therapeutic apparatus for reducing snoring
US4919128 *Aug 26, 1988Apr 24, 1990University Technologies International Inc.Nasal adaptor device and seal
US4955393 *Mar 30, 1988Sep 11, 1990Trident Laboratories, Inc.Mouthguard with conformable arch liners
US5003994 *Oct 10, 1989Apr 2, 1991Cook George WOral appliance for improving breathing and methods of using and making same
US5018533 *May 25, 1989May 28, 1991Hawkins Richard HApparatus for the reduction of apnaa in the edentulous
US5042506 *Apr 16, 1990Aug 27, 1991Liberati Salvator PAntisnoring training device
US5056534 *May 2, 1990Oct 15, 1991Wright David W RSnore inhibiting device
US5092346 *Nov 16, 1990Mar 3, 1992Hays & Meade, Inc.Dental orthosis for alleviation of snoring
US5103838 *Feb 9, 1990Apr 14, 1992Yousif Edward NDental night guard
US5117816 *Jan 3, 1991Jun 2, 1992Shapiro Norman AAnti-snore device
US5313960 *Nov 4, 1992May 24, 1994Marc S. BernsteinApparatus and method for reducing snoring and method of making same
DE2320501A1 *Apr 21, 1973Nov 28, 1974Stockfisch Dr Med Dent HugoVorrichtung zur verminderung des schlafatemgeraeusches
DE3707952A1 *Mar 12, 1987Sep 22, 1988Ernst Dipl Ing HoermannBreathing mask for long-term operation
EP0312368A1 *Oct 13, 1988Apr 19, 1989HAYS & MEADE, INC.A device for preventing snoring
EP0359135A1 *Sep 7, 1989Mar 21, 1990Sunstar Kabushiki KaishaMouthpiece
GB1569129A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5752510 *Nov 14, 1996May 19, 1998Goldstein; JosephNasal and oral air passageway delivery management apparatus
US5755219 *May 14, 1996May 26, 1998Thornton; W. KeithDevice for improving breathing
US5826579 *Oct 25, 1996Oct 27, 1998University Technologies International, Inc.Remote-controlled mandibular positioning device and method of using the device
US5829441 *Jun 24, 1997Nov 3, 1998Nellcor Puritan BennettCustomizable dental device for snoring and sleep apnea treatment
US5954048 *Apr 16, 1997Sep 21, 1999Thornton; W. KeithDevice and method for improving breathing
US5983892 *Jun 19, 1997Nov 16, 1999Thornton; W. KeithDevice for improving breathing
US6012455 *May 14, 1998Jan 11, 2000Goldstein; JosephNasal air delivery apparatus
US6055986 *May 2, 1997May 2, 2000Meade; Thomas E.Apparatus and method for the reduction of snoring
US6155262 *Jan 21, 1997Dec 5, 2000Thornton; W. KeithMethod and apparatus for adjusting a dental device
US6209542 *Jan 31, 1996Apr 3, 2001W. Keith ThorntonCombination face mask and dental device for improved breathing during sleep
US6305376Sep 9, 1999Oct 23, 2001W. Keith ThorntonDevice and method for improving breathing
US6374824 *Apr 12, 1999Apr 23, 2002W. Keith ThorntonDevice for improving breathing
US6516805Mar 31, 1997Feb 11, 2003W. Keith ThorntonApparatus for prevention of snoring and improved breathing during sleep
US6530373Aug 4, 2000Mar 11, 2003Mallinckrodt Inc.Respirator mask
US6571798 *Apr 5, 2000Jun 3, 2003W. Keith ThorntonDevice for improving breathing and method of constructing same
US6860270 *Aug 2, 2001Mar 1, 2005Joseph A. SniadachDouble barrel ventilation mask for a patient
US6877513Jan 17, 2001Apr 12, 2005Respironics, Inc.Intraoral apparatus for enhancing airway patency
US6895965 *Mar 26, 2002May 24, 2005Respironics, Inc.Customizable seal, mask with customizable seal and method of using such a seal
US7174895 *May 1, 2003Feb 13, 2007W. Keith ThorntonDevice and method for improving a user's breathing
US7255107Oct 14, 2003Aug 14, 2007Gomez Roy CNasal mask assembly for nasal delivery
US7328698Oct 12, 2004Feb 12, 2008Ric Investments, LlcIntraoral apparatus for enhancing airway patency
US7455063Jun 17, 2005Nov 25, 2008Nellcor Puritan Bennett LlcAdjustable gas delivery mask having a flexible gasket
US7490608Jun 17, 2005Feb 17, 2009Nellcorr Puritan Bennett LlcSystem and method for adjusting a gas delivery mask
US7600514Jun 17, 2005Oct 13, 2009Nellcor Puritan Bennett LlcSystem and method for securing a gas delivery mask onto a subject's head
US7798146Oct 27, 2005Sep 21, 2010Ric Investments, LlcOral appliance
US7827987Jun 17, 2005Nov 9, 2010Nellcor Puritan Bennett LlcBall joint for providing flexibility to a gas delivery pathway
US7849855Jun 17, 2005Dec 14, 2010Nellcor Puritan Bennett LlcGas exhaust system for a gas delivery mask
US7870859Feb 4, 2005Jan 18, 2011Ric Investments, LlcPatient contacting seal and mask using same
US7900630Jun 17, 2005Mar 8, 2011Nellcor Puritan Bennett LlcGas delivery mask with flexible bellows
US7909035Jul 6, 2006Mar 22, 2011Airway Technologies, LlcMulti-chamber mask and method of forming the same
US7975693Oct 16, 2008Jul 12, 2011Nellcor Puritan Bennett LlcAdjustable gas delivery mask having a flexible gasket
US7992558Sep 11, 2007Aug 9, 2011Airway Technologies LlcStability medical mask
US8104473Aug 3, 2009Jan 31, 2012Nellcor Puritan Bennett LlcSystem and method for securing a gas delivery mask onto a subject's head
US8226407Jun 24, 2010Jul 24, 2012Kosmo Technologies, LlcMandibular manipulator
US8312884Dec 24, 2008Nov 20, 2012Brian D FuselierIntra-oral apnea and snoring prevention appliance
US8336550Oct 28, 2011Dec 25, 2012Joseph GoldsteinRespiratory device
US8430095 *Dec 10, 2009Apr 30, 2013Nihon Kohden CorporationBite block
US8485190Dec 13, 2010Jul 16, 2013Ric Investments, LlcPatient contacting seal and mask using same
US8550816Jul 23, 2012Oct 8, 2013Kosmo Technologies, LlcMandibular manipulator and related methods
US8684006Mar 24, 2011Apr 1, 2014Advanced Brain Monitoring, Inc.Systems and methods for optimizing oral appliance therapy for the treatment of sleep apnea
US8783260Jun 4, 2010Jul 22, 2014Zst Holdings Inc.Apparatuses and methods for mandibular protrusion
US20100317987 *Dec 10, 2009Dec 16, 2010Nihon Kohden CorporationBite block
WO1998020924A1 *Nov 10, 1997May 22, 1998Joseph GoldsteinNasal and oral air passageway delivery management apparatus
WO1999058181A1 *May 11, 1999Nov 18, 1999Joseph GoldsteinNasal air delivery apparatus
WO1999065555A1 *Jun 16, 1999Dec 23, 1999W Keith ThorntonDevice for improving breathing
WO2000013751A1 *Sep 2, 1999Mar 16, 2000Donald P ElliottMethod and device for administering gas to a patient
WO2001052928A1 *Jan 19, 2001Jul 26, 2001Respironics IncIntraoral apparatus for enhancing airway patency
Classifications
U.S. Classification128/204.18, 128/201.18, 128/205.25, 128/206.21, 128/207.18, 128/848
International ClassificationA61C7/36, A61F5/56, A61M16/04, A63B71/08, A62B18/08, A62B9/06, A61C5/14, A62B18/02, A61M16/06
Cooperative ClassificationA62B9/06, A61M16/0683, A63B71/085, A61C7/36, A61F5/566, A61M16/0488, A61M16/0493, A61M16/06
European ClassificationA62B9/06, A61M16/06, A61M16/04M, A61F5/56B
Legal Events
DateCodeEventDescription
Jun 10, 2010ASAssignment
Owner name: AIRWAY TECHNOLOGIES, LLC,TEXAS
Effective date: 20100601
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:THORNTON, W. KEITH;REEL/FRAME:24517/34
Owner name: AIRWAY TECHNOLOGIES, LLC, TEXAS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:THORNTON, W. KEITH;REEL/FRAME:024517/0034
Dec 31, 2007FPAYFee payment
Year of fee payment: 12
Jan 23, 2004FPAYFee payment
Year of fee payment: 8
Dec 29, 1999FPAYFee payment
Year of fee payment: 4